- Dont' forget Gmail's inability to sort email by anything other than the received date. - You can't see -and therefore sort or search- by message size either, making cleaning up your account of large messages unnecessarily difficult to achieve. - Oh, and you can't add labels to a message you are composing so it can be found quickly again later (tedious workaround is to save your message, go to the draft box, open it, apply the labels you want, then send it...)